Decoupling of soil microbes and plants with increasing anthropogenic nitrogen inputs in a temperate steppe
文献类型：期刊论文
| 作者 | Liu, Weixing; Jiang, Lin1; Hu, Shuijin2; Li, Linghao ; Liu, Lingli; Wan, Shiqiang3
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| 刊名 | SOIL BIOLOGY & BIOCHEMISTRY
 |
| 出版日期 | 2014 |
| 卷号 | 72页码:116-122 |
| 关键词 | Soil acidification Decoupling Grassland Plant Soil microbes N addition |
| ISSN号 | 0038-0717 |
| DOI | 10.1016/j.soilbio.2014.01.022 |
| 文献子类 | Article |
| 英文摘要 | Plant growth and soil microbial activity are intrinsically correlated. Numerous evidence shows that nitrogen (N) deposition can greatly alter both processes. However, it is unknown whether such changes caused by N deposition can create new dynamics between plants and soil microbes. This study was conducted with an attempt to examine the plant microbe relationship along an N addition gradient. Eight levels of N addition (0,1, 2, 4, 8,16, 32, 64 g N m(-2)) were applied annually in a temperate steppe in northern China since 2003. Plant and soil samples were collected from 2005 to 2007. We found that N addition acidified soil significantly. Both plant aboveground biomass and dissolved organic carbon (DOC) increased with increasing N input. However, soil microbial biomass carbon (MBC), microbial biomass nitrogen (MBN) and (soil) microbial respiration showed nonlinear responses to N input. Low levels of N inputs stimulated MBC, MBN and microbial respiration, whereas high levels of N input suppressed them. Although MBC and MBN were both positively correlated with aboveground biomass at each level of N treatments, the dependence of such biomass on MBC and MBN declined with the increase in N addition, as indicated by the exponential decreases in the regression coefficients. The weakened linkage between aboveground biomass and MBC was mostly attributed to soil acidification. The decrease in soil pH caused by elevated N inputs reduced soil microbial activities, but not plant growth. Overall, our results revealed a trend of shifting plant microbe relationship from coupling to decoupling with the increase of N input. The divergent responses of plants and soil microbial activities under intensified N addition could have consequent impacts on ecosystem function and services. (C) 2014 Elsevier Ltd. All rights reserved. |
| 学科主题 | Soil Science |
| 出版地 | OXFORD |
| 电子版国际标准刊号 | 1879-3428 |
| WOS关键词 | PRIMARY PRODUCTIVITY ; CARBON ; LIMITATION ; ACIDIFICATION ; METAANALYSIS ; PHOSPHORUS ; DEPOSITION ; COMMUNITY ; BIOMASS ; BIODIVERSITY |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000334973700015 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of China [31370488] ; Chinese National Key Development Program for Basic Research [2013CB956304] ; Yong Project of State Key Laboratory of Vegetation and Environmental Change [2011qnrc04] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/27055]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Georgia Inst Technol, Sch Biol, Atlanta, GA 30332 USA 3.N Carolina State Univ, Dept Plant Pathol, Raleigh, NC 27695 USA 4.Henan Univ, Coll Life Sci, Key State Lab Cotton Biol, Kaifeng 475004, Henan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Weixing,Jiang, Lin,Hu, Shuijin,et al. Decoupling of soil microbes and plants with increasing anthropogenic nitrogen inputs in a temperate steppe[J]. SOIL BIOLOGY & BIOCHEMISTRY,2014,72:116-122. |
| APA | Liu, Weixing,Jiang, Lin,Hu, Shuijin,Li, Linghao,Liu, Lingli,&Wan, Shiqiang.(2014).Decoupling of soil microbes and plants with increasing anthropogenic nitrogen inputs in a temperate steppe.SOIL BIOLOGY & BIOCHEMISTRY,72,116-122. |
| MLA | Liu, Weixing,et al."Decoupling of soil microbes and plants with increasing anthropogenic nitrogen inputs in a temperate steppe".SOIL BIOLOGY & BIOCHEMISTRY 72(2014):116-122. |
入库方式： OAI收割
来源：植物研究所
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